Lossless real-time detecting method and system for magnetic conductive material

Abstract

The invention discloses a lossless real-time detecting method and system for a magnetic conductive material. The lossless real-time detecting method comprises the following steps of: collecting a signal of the magnetic conductive material after being magnetized by a giant magneto resistive sensor, and comparing the collected signal with a normal value of the magnetic conductive material under a zero defect state in the prior art and a typical value of reluctance change under the existence of interior defect so as to judge the flow of the inner magnetic field in the present position of the magnetic conductive material and the magnetic field diffusing state in the position of defect. A system adopted by the method comprises N sets of GMR (Giant Magneto Resistive) sensor chipsets, a lower computer control module, a magnetizing device, an alarm device, a data collecting and processing module and an upper computer, wherein the magnetizing device is used for realizing the magnetization and demagnetization of the magnetic conductive material; the sensor chipsets are used for sensing the change of reluctance change of the magnetic conductive material; and the data collecting and processing module is used for processing an analog signal collected by the sensor chipsets and then comparing with the typical value and an ideal value. The lossless real-time detecting method is low in detection cost, is used for effectively detecting a strange part and does not threaten a human body.

Description

technical field [0001] The invention relates to a non-destructive real-time detection method and system for magnetically permeable materials. Background technique [0002] With the development of the economy, the products made of iron, cobalt and nickel magnetic permeable materials are becoming more and more extensive. However, in our country, the nondestructive testing of iron and steel magnetic materials is still a difficult point. Even though there are some testing methods on the market, they cannot complete the required nondestructive testing economically, safely and conveniently. Many magnetic materials in service now adopt regular maintenance and scrapping strategies to avoid or reduce accidents and economic losses. However, due to the influence of material processing, storage, and use conditions, regular maintenance and scrapping of service equipment will not only increase The cost of use may also ignore the possible defects of in-service equipment, causing unnecessa...

AI Technical Summary

Problems solved by technology

However, in our country, the non-destructive testing of iron and steel magnetic materials is still a difficult point. Even though there are some testing methods on the market, they cannot complete the required non-destructive testing economically, safely and conveniently.

Many magnetic materials in service now adopt regular maintenance and scrapping strategies to avoid or reduce accidents and economic losses. However, due to the influence of material processing, storage, and use conditions, regular maintenance and scrapping of service equipment will not only increase The cost of use may also ignore the possible defects of equipment in service, which will bring unnecessary economic losses to users and even endanger personal safety.

[0003] The current non-destructive testing process of magnetic materials is mostly through ultrasonic testing or magnetic powder non-destructive testing technology, but the cost of ultrasonic testing is relatively high, and the conditions of use are relatively strict, the coupling space is small, and it is impossible to effectively detect singular parts; Detection not only cannot realize real-time detection, but the fine magnetic dust will also pose a threat to the human body, so it is not suitable for long-term use

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